Impact of vegetation geometry and distribution on bedload transport

植被几何形状和分布对底质输送的影响

基本信息

  • 批准号:
    1854564
  • 负责人:
  • 金额:
    $ 40.78万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2019
  • 资助国家:
    美国
  • 起止时间:
    2019-07-01 至 2024-02-29
  • 项目状态:
    已结题

项目摘要

Coastal marshes attenuate storm surge and waves, protecting life and property. This green infrastructure also improves water quality and provides habitat for economically important fisheries. Similarly, floodplain vegetation reduces flood peaks, enhances bank stability, and reduces nutrient loading to river channels. Because of these benefits, resource managers advocate the replanting and ecological management of vegetated landscapes along river corridors and in coastal zones. The US spends billions of dollars each year to restore these landscapes. The restoration efforts, which include the re-establishment of vegetation and the diversion of sediment into eroded areas, require a fundamental understanding of sediment transport and retention in vegetated regions that this project will help provide. In addition to these desired societal benefits that could stem from this research, the project will also train one doctoral student, support one undergraduate student each summer, and include outreach in Boston-area middle and high schools.This research project will develop physical predictions of sediment transport as a function of flow and vegetation characteristics. The new models will be developed through a series of laboratory experiments using model vegetation of increasing complexity that will build an understanding of how vegetation geometry and distribution within a channel impact velocity, turbulence, and sediment transport. Experiments will record velocity and channel-scale sediment flux, and will use laser-scans to track bathymetric evolution. The transfer of new models to practical application in the full-scale restoration projects will be facilitated through collaboration with the US Bureau of Reclamation.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
沿海沼泽减弱风暴潮和波浪,保护生命和财产。这种绿色基础设施还改善了水质,并为具有重要经济意义的渔业提供了栖息地。同样,洪泛区植被减少了洪峰,增强了河岸稳定性,并减少了河道的营养负荷。由于这些好处,资源管理人员提倡对沿着走廊和沿海地区的植被景观进行重新种植和生态管理。美国每年花费数十亿美元来恢复这些景观。恢复工作包括恢复植被和将沉积物转移到受侵蚀地区,需要对植被覆盖地区的沉积物迁移和保持有基本的了解,而本项目将有助于提供这种了解。除了这些理想的社会效益,可以从这项研究中产生,该项目还将培养一名博士生,支持一名本科生,每年夏天,并包括在波士顿地区的初中和高中的推广。新的模型将通过一系列实验室实验开发,使用日益复杂的模型植被,这将建立一个了解如何植被的几何形状和分布在一个通道内的影响速度,湍流和泥沙输运。实验将记录流速和河道尺度的沉积物通量,并将使用激光扫描跟踪水深演变。通过与美国垦务局的合作,将促进新模型在全面恢复项目中的实际应用。该奖项反映了NSF的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。

项目成果

期刊论文数量(2)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Suspended Sediment Concentration Profile in a Typha Latifolia Canopy
香蒲冠层中的悬浮沉积物浓度分布
  • DOI:
    10.1029/2021wr029902
  • 发表时间:
    2021
  • 期刊:
  • 影响因子:
    5.4
  • 作者:
    Yuan Xu;Heidi Nepf
  • 通讯作者:
    Heidi Nepf
Turbulence Dictates Bedload Transport in Vegetated Channels Without Dependence on Stem Diameter and Arrangement
  • DOI:
    10.1029/2021gl095316
  • 发表时间:
    2021-10
  • 期刊:
  • 影响因子:
    5.2
  • 作者:
    T. Zhao;H. Nepf
  • 通讯作者:
    T. Zhao;H. Nepf
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Heidi Nepf其他文献

Measured and Predicted Turbulent Kinetic Energy in Flow Through Emergent Vegetation With Real Plant Morphology
利用真实植物形态测量和预测流经挺水植被的湍流动能
  • DOI:
    10.1029/2020wr027892
  • 发表时间:
    2020-11
  • 期刊:
  • 影响因子:
    5.4
  • 作者:
    Yuan Xu;Heidi Nepf
  • 通讯作者:
    Heidi Nepf
Sediment Pickup Rate in Bare and Vegetated Channels
裸露和植被河道的沉积率
  • DOI:
    10.1029/2022gl101279
  • 发表时间:
    2022-10
  • 期刊:
  • 影响因子:
    5.2
  • 作者:
    Yuan Xu;Danxun Li;Heidi Nepf
  • 通讯作者:
    Heidi Nepf
Turbulence and Particle Deposition Under Steady Flow Along a Submerged Seagrass Meadow
水下海草甸稳定流下的湍流和颗粒沉积
The thresholds of sediment resuspension within emergent vegetation under combined wave-current conditions – A flume experiment
波流联合条件下挺水植物内部泥沙再悬浮的阈值——一项水槽实验
  • DOI:
    10.1016/j.coastaleng.2025.104727
  • 发表时间:
    2025-06-15
  • 期刊:
  • 影响因子:
    4.500
  • 作者:
    Thomas J. van Veelen;Heidi Nepf;Suzanne J.M.H. Hulscher;Bas W. Borsje
  • 通讯作者:
    Bas W. Borsje
Proximity to inlet channel drives spatial variation in sediment carbon across a lagoonal seagrass meadow
靠近进水通道驱动了泻湖海草草甸中沉积物碳的空间变化
  • DOI:
    10.1016/j.scitotenv.2024.177022
  • 发表时间:
    2024-12-10
  • 期刊:
  • 影响因子:
    8.000
  • 作者:
    Rachel Schaefer;Phil Colarusso;Juliet C. Simpson;Alyssa Novak;Heidi Nepf
  • 通讯作者:
    Heidi Nepf

Heidi Nepf的其他文献

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{{ truncateString('Heidi Nepf', 18)}}的其他基金

Predictive Models for Wave Damping by Flexible Aquatic Vegetation
柔性水生植被的波浪阻尼预测模型
  • 批准号:
    1659923
  • 财政年份:
    2017
  • 资助金额:
    $ 40.78万
  • 项目类别:
    Standard Grant
Sediment Transport in Vegetated Channels: Evaluating the Roles of Mean Bed Stress and Turbulent Impulse on Incipient Motion
植被河道中的沉积物输送:评估平均床应力和湍流脉冲对初始运动的作用
  • 批准号:
    1414499
  • 财政年份:
    2014
  • 资助金额:
    $ 40.78万
  • 项目类别:
    Standard Grant
The Impact of Blade Motion on the Flux to a Blade Surface
叶片运动对叶片表面通量的影响
  • 批准号:
    1140970
  • 财政年份:
    2012
  • 资助金额:
    $ 40.78万
  • 项目类别:
    Continuing Grant
Collaborative Research: Dispersion of Particles Within and Above Plant Canopies
合作研究:植物冠层内部和上方的颗粒分散
  • 批准号:
    1005480
  • 财政年份:
    2011
  • 资助金额:
    $ 40.78万
  • 项目类别:
    Continuing Grant
Mass Exchange between Flexible Submerged Canopies and Adjacent Open Water
灵活的水下檐篷和相邻开放水域之间的物质交换
  • 批准号:
    0751358
  • 财政年份:
    2008
  • 资助金额:
    $ 40.78万
  • 项目类别:
    Standard Grant
Predicting In-Canopy Velocity and Retention Time for Aquatic Canopies
预测水生冠层的冠层内速度和保留时间
  • 批准号:
    0738352
  • 财政年份:
    2008
  • 资助金额:
    $ 40.78万
  • 项目类别:
    Standard Grant
Thermally-Driven Exchange Flows in Regions of Vegetation
植被区域中热驱动的交换流
  • 批准号:
    0509658
  • 财政年份:
    2005
  • 资助金额:
    $ 40.78万
  • 项目类别:
    Continuing Grant
Dispersion in Vegetated Flow
植被流的分散
  • 批准号:
    0309188
  • 财政年份:
    2003
  • 资助金额:
    $ 40.78万
  • 项目类别:
    Continuing Grant
Momentum and Scalar Exchange Between Channels and Vegetated Banks
通道和植被银行之间的动量和标量交换
  • 批准号:
    0125056
  • 财政年份:
    2002
  • 资助金额:
    $ 40.78万
  • 项目类别:
    Continuing Grant
(CAREER) Metals Transport in Transition Wetlands: Research and Education Development Plan
(职业)过渡湿地中的金属运输:研究和教育发展计划
  • 批准号:
    9629259
  • 财政年份:
    1997
  • 资助金额:
    $ 40.78万
  • 项目类别:
    Continuing Grant

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LTREB:合作研究:泥炭地碳通量的长期变化以及气候变化中水文、植被和氧化还原供应变化的相互作用
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